Microgame #15 in the Metagaming Microgames series is a tactical game about the Technocrat raid on Chiros. The Ziegler Corporations maintains fragile, floating platforms called crustals that move through the molten rock. The crustals are defended by infantry and hovercraft. The Technocrat attackers are strong, but they must capture crustals quickly, before their units melt into the lava. Contents include a playing map, an illustrated rules booklet, and counters for both the crustals and combat units